Upset-tube fitting



Feb. 19 1924.

H. W, BUNDY UPSET TUBE FITTING Filed Nov. 16, 1922 I m l Patented Feb. 19, 1924.

UNITED STATES HAR-RY W. BUNDY, OF DETROIT7 MICHIGAN.

'UPSET-IUBE FITTING.

Application filed November 16, 1922.

To @ZZ whom t may conce-rn.'

Be it known that HARRY lV. BUNDY, a citizen of the United States, residing at Detroit, in the county of `Wayne and State of Michigan, has invented certain new and use- 'lul Improvements in Upset-Tube Fittings, of which the following is a specilication.

This invention relates to pipe unions in which an upset tube is adapted to ft in a standard Society ot riutoiuobile Engineers` iitting. An object ct the present invention is to V(construct a tube vmember with upset ends, which is considerably stronger than a tube with lared ends.

A further object is to so construct the nipple that it will bite into the end oi the upset tube providing a better connection than is; obtainable with a flared tube.

In a Haring tube, the metal is stretched and made harder resulting in a` more brittle metal. This often causes the metal to crack when iiared. Furthermore the flared portion is thinner and theretorerthe strength ot the .metal is decreased. It is impossible to iiare the ends of a brass tube and some other alloys with. any degree of success. A copper tube can be flared but it is desirable to use a brass tube which is stronger and cheaper. I use a brass tube in the standard Society ot Automobile Engineers fitting which is so constructed as to receive a iiared tube. Instead of using a1 iiared tube in the Society of Automobile Engineers iitting whose Vflared portion is thinner and weaker, I use an upset tube which provides an end that is thicker and stronger.

In the dra-wings:

Fig. 1 is an elevation of the tube and a standard Society of Automobile Engineers litting.

Fig. 2 is a` section' thru the same, showing the fitting countersunk to provide a beveled edge.

Fig. 3 `is a section on the line 3 3 ot Fig. 2.

Figs. i to 6 inclusive show the method ot upsetting the ends of the tube.

Fig. 7 is a View similar to Fig. 2 showing a standard Society of Automobile Engineers fitting.

A tube a preferably made of brass or other metal, has the upset end or head This upset end or head is formed by th usual process of upsetting as is shown in Figs. 4t to 6 inclusive, but it` is so upset as Serial No. 601,387.

to provide a tapered surface c on the lower side et the upset end.

The standard Society of Automobile Engineers fitting or union consists of two parts (l and e, one screwed into the other. The socket part `c is provided with the tapered shoulder f which is normally adapted to receive the end of a flared tube. The bevelled surface c on the upset tube is adapted to engage with this bevelled shoulder 7, of the standard Society ot Automobile `Engineers socket. The nipple part d ot the Society of Automobile Engineersl fitting is provided with countersunk end g. This provides a sharp ridge which will bite into the upset end oi' the tube when the two parts Z and e of the Society ot Automobile Engineers fitting are screwed down tight, clamping the upset and flanged end ot the tube against the shoulder A union is thus provided which is obviously stronger than one in which a ila-red tube is used. In addition the circular ridge resulting from said counter-sinking opera tion enables the union to be drawn down tighter providing a better liquid tight joint than can be obtained with the use of a flared tube.

What I claim is:

1. In a pipe union, the combination of a coupling comprising a nipple part and a socket part provided with a bevelled seat and which engage each other, and a tube having its end folded over and upset to form a crowded-together thickened portion bevelled on the outside complementary to said bevelled seat in the socket, the said upset end of the tube being forced against the seat of the socket when the nipple part and the socket part are engaged.

2. In a pipe union, the combination of a coupling provided with a socket part and a nipple part that engage each other, the said socket part being provided with a seating portion, the nipple portion being provided in its inner end with a relatively sharp ridge, and a tube provided with a crowdedltogether thickened end, the said ridge of the nipple being arranged to bite into the substance of the thickened head when the socket and nipple parts are engaged together.

3. In a pipe union, the combination of a coupling provided with a socket part and a nipple part, the socket part being proldi) vided with a seating portion and the nipple part being provided Withia ridge, a-tube having unfolded overfend/orrning a crowdcd-togetl1er thickened flange, the said ridge arranged to bit into Athe vsubstance oi the thickened flange when the nipple and vSocket parts are engaged. I

at. In a pipe union, the combination of a coupling having asocket .partrand afnipple part that screw together, the socket part being provided fxvithha seating portionv and the nipple provided With `albevelled and countersunk inner `end, and forming -a relatijvelvv Sharp ridge, a tubevhaving its end folded in to Jforniathickened head, the said tube arranged to seatfon the. seating portion ofthe socket part, ka-nd.:t'lie Said ridge arranged to bite into the substance or the thickened'head when the coupling parts are screwed together.k i

na pipe union, the combination of a coupling having. a socket'part provided with a kbevelled seat anda nipple parthaving a bevelled inner end ythat is also countersunk to iorrn a relatively-sharp ridge, thesaid coupling parts screwing together, and a tube having its end folded over and upset to Vprovide a `bevelled l portion complementary to the seater the socket and a thickened portion, the said ridge of the nipple arranged to bite into said .thickened portion when thefcoupling parte are screwed together.

6. In a pipe union, the combination of a couplingcomprising a nipple part and a socket part provided With a bevelledseat and Whichengage each other, anda tube composed of tough and comparativelyhard metal and having its end upset lunder-pressure to Ivform thickened flange on the end through oi two different diameters formed by a tapered shoulder, atube having its end upset and foldedin to 'forni a thickened head oi greater 'diameter thanfthe main portionotthe tube, taperedonthe side that joins theftube and abrupt on the outer end, and anipple screwingintoithe socket party and provided with a sharp -end :arranged to bite into a1rintermediate:por tion of the abruptend of the head and also 'force the tapered. side of the head into wedging engagement With the tapered shoulder of the socket part.

8. ln a pipefunion, the combination of'a socket part provided With openingstherethrough 1 oi? two diiierent diameters joined by a tapered shoulder, a tube havinguits end upset and `folded in to forni a-thickened head of greater diameter than thefinein portion of? the tube, taperedion the side that joins the tube'and abrupt .on .the outer endand anipple Aarranged to engagewin the socket s part and Aprovided with ,an end which can beforcedagainst'the abrupt face oi" the 4tube head ito `rnake a .joint at 'this point and alsok force the` tapered portion or" the 4head againstthertaperedehoulder of the socket to 'lorrn afseal. Y

lirteetiinony whereof I aiiix mylsigna.-

ture.

HARRY iV; BUN DY. 

